Very high-Q insensitive active RC networks

A new circuit realizing high stable
Q
's is presented. The frequency dependence of the operational amplifiers, which has been the principal limiting factor for high
Q
at higher frequencies for networks presented in the literature, has been taken into account. The performance of the new network is shown to be superior to the realizations thus far presented in the literature for the following reasons. The
Q
realized by the new circuit is independent of the operational-amplifier bandwidth, which results in a stable response. The realization is also insensitive to manufacturing tolerances and, therefore, it can be readily tuned for the desired
Q
and center frequency without encountering any stability problems.